Try some clustering

library(tidyverse)
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library(tidymodels)
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library(cluster)
library(ggfortify)
Registered S3 method overwritten by 'ggfortify':
  method          from   
  autoplot.glmnet parsnip

get leaflength data

leaflength <- read_csv("../../plant/output/leaf_lengths_metabolite.csv") %>%
  mutate(pot=str_pad(pot, width=3, pad="0"),
         sampleID=str_c("wyo", genotype, pot, sep="_")) %>%
  select(sampleID, genotype, trt, leaf_avg, leaf_avg_std)
Rows: 36 Columns: 6── Column specification ────────────────────────────────────────────
Delimiter: ","
chr (3): soil, genotype, trt
dbl (3): pot, leaf_avg, leaf_avg_std
ℹ Use `spec()` to retrieve the full column specification for this data.
ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
leaflength %>% arrange(sampleID)

get and wrangle metabolite data

met_raw <-read_csv("../input/metabolites_set1.csv")
Rows: 72 Columns: 671── Column specification ────────────────────────────────────────────
Delimiter: ","
chr   (6): tissue, soil, genotype, autoclave, time_point, concat...
dbl (665): submission_number, pot, sample_mass mg, xylulose NIST...
ℹ Use `spec()` to retrieve the full column specification for this data.
ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
met <- met_raw %>% 
  mutate(pot=str_pad(pot, width = 3, pad = "0")) %>%
  mutate(sampleID=str_c("wyo", genotype, pot, sep="_")) %>%
  mutate(trt=ifelse(is.na(autoclave), "BLANK", autoclave)) %>%
  select(sampleID, genotype, tissue, trt, sample_mass = `sample_mass mg`, !submission_number:concatenate)  %>%
  
  #bring in leaf length
  left_join({leaflength %>% select(sampleID, leaf_avg_std)}) %>%
  select(sampleID, genotype, tissue, trt, leaf_avg_std, everything()) %>%
  
  #make long
  pivot_longer(!sampleID:sample_mass, names_to = "metabolite", values_to = "met_amt") %>%
  
  #filter away unnamed
  filter(str_detect(metabolite, pattern="^[0-9]+$", negate=TRUE)) %>%
  
  #adjust by sample mass
  mutate(met_per_mg=met_amt/sample_mass) %>%
  
  pivot_wider(id_cols = c(sampleID, genotype, trt, leaf_avg_std), 
              names_from = c(tissue, metabolite), 
              values_from = starts_with("met_"),
              names_sep = "_")
Joining with `by = join_by(sampleID)`
met 

split this into two data frames, one normalized by tissue amount and one not.

met_per_mg <- met %>% select(sampleID, genotype, trt, starts_with("met_per_mg")) %>%
  as.data.frame() %>% column_to_rownames("sampleID")
met_amt <- met %>% select(sampleID,  genotype, trt, starts_with("met_amt")) %>%
  as.data.frame() %>% column_to_rownames("sampleID")

met_per_mg


met_per_mg.scale <- met_per_mg %>% mutate(across(.cols=-c(genotype, trt), .fns=scale))

met_per_mg.scale.t <- met_per_mg.scale %>% select(-genotype, -trt) %>% t() %>% as.data.frame()

metadata for later plotting

sample_meta <- leaflength %>% 
  select(sample=sampleID, genotype, trt, leaf_avg, leaf_avg_std) %>%
  mutate(sample_merge=make.unique(str_c(genotype, "_", trt)))
sample_meta

PCA

met_per_mg.pca <- met_per_mg.scale.t %>%  prcomp(scale.=TRUE)

met_per_mg_PCs <- met_per_mg.pca %>% magrittr::extract2("x") %>% as.data.frame()

met_per_mg_PCs %>% ggplot(aes(x=PC1,y=PC2)) +
  geom_point()


met_per_mg_PCs %>% ggplot(aes(x=PC2,y=PC3)) +
  geom_point()


met_per_mg_PCs %>% ggplot(aes(x=PC3,y=PC4)) +
  geom_point()

met_per_mg.mds <- met_per_mg.scale.t %>% dist() %>% cmdscale(x.ret=TRUE) 
autoplot(met_per_mg.mds)

met_per_mg.tsne <- met_per_mg.scale.t %>% tsne::tsne()
sigma summary: Min. : 0.320970396293183 |1st Qu. : 0.512682589759317 |Median : 0.573038635973548 |Mean : 0.607180548050454 |3rd Qu. : 0.668422063255215 |Max. : 1.09511513963814 |
Epoch: Iteration #100 error is: 17.2872595160823
Epoch: Iteration #200 error is: 0.977562788493326
Epoch: Iteration #300 error is: 0.906612716558305
Epoch: Iteration #400 error is: 0.899198146968262
Epoch: Iteration #500 error is: 0.892931378266666
Epoch: Iteration #600 error is: 0.884506312848133
Epoch: Iteration #700 error is: 0.884017505672013
Epoch: Iteration #800 error is: 0.882242081478597
Epoch: Iteration #900 error is: 0.879067815552968
Epoch: Iteration #1000 error is: 0.874062779961324
met_per_mg.tsne %>% plot()

kclust <- tibble(k=3:8) %>%
  mutate(kclust=map(k, ~kmeans(met_per_mg.scale.t, .x)),
         tidied = map(kclust, tidy),
         glanced = map(kclust, glance),
         augmented = map(kclust, augment, as_tibble(met_per_mg.mds$points) )
  )
Warning: There was 1 warning in `mutate()`.
ℹ In argument: `augmented = map(kclust, augment,
  as_tibble(met_per_mg.mds$points))`.
Caused by warning:
! The `x` argument of `as_tibble.matrix()` must have unique column
  names if `.name_repair` is omitted as of tibble 2.0.0.
ℹ Using compatibility `.name_repair`.
This warning is displayed once every 8 hours.
Call `lifecycle::last_lifecycle_warnings()` to see where this
warning was generated.
kclust
clusters <- 
  kclust %>%
  unnest(cols = c(tidied))

assignments <- 
  kclust %>% 
  unnest(cols = c(augmented))

clusterings <- 
  kclust %>%
  unnest(cols = c(glanced))
RColorBrewer::display.brewer.all(type="qual")

p1 <- 
  ggplot(assignments, aes(x = V1, y = V2)) +
  geom_point(aes(color = .cluster)) + 
  facet_wrap(~ k) +
  scale_color_brewer(palette="Set1", direction = -1) +
  ggtitle("kmeans")
p1

ggplot(clusterings, aes(k, tot.withinss)) +
  geom_line() +
  geom_point()

Pam Euclidean

pcluste <- tibble(k=3:8) %>%
  mutate(pcluste=map(k, ~pam(met_per_mg.scale.t, .x, diss=FALSE)),
         tidied = map(pcluste, tidy),
         glanced = map(pcluste, glance),
         augmented = map(pcluste, augment, as_tibble(met_per_mg.mds$points) )
  )

pcluste
clusters <- 
  pcluste %>%
  unnest(cols = c(tidied))

assignments <- 
  pcluste %>% 
  unnest(cols = c(augmented))

clusterings <- 
  pcluste %>%
  unnest(cols = c(glanced))
p2 <- 
  ggplot(assignments, aes(x = V1, y = V2)) +
  geom_point(aes(color = .cluster)) + 
  facet_wrap(~ k) +
  scale_color_brewer(palette="Set1", direction = -1) +
  ggtitle("Pam Euclidean")
p2

ggplot(clusterings, aes(k, avg.silhouette.width)) +
  geom_line() +
  geom_point()

Pam Manhattan

pclustm <- tibble(k=3:8) %>%
  mutate(pclustm=map(k, ~pam(met_per_mg.scale.t, .x, diss=FALSE, metric="manhattan")),
         tidied = map(pclustm, tidy),
         glanced = map(pclustm, glance),
         augmented = map(pclustm, augment, as_tibble(met_per_mg.mds$points) )
  )

pclustm
clusters <- 
  pclustm %>%
  unnest(cols = c(tidied))

assignments <- 
  pclustm %>% 
  unnest(cols = c(augmented))

clusterings <- 
  pclustm %>%
  unnest(cols = c(glanced))
p3 <- 
  ggplot(assignments, aes(x = V1, y = V2)) +
  geom_point(aes(color = .cluster)) + 
  facet_wrap(~ k) +
  scale_color_brewer(palette="Set1", direction = -1) +
  ggtitle("Pam Manhattan")
p3

ggplot(clusterings, aes(k, avg.silhouette.width)) +
  geom_line() +
  geom_point()

Compare

p1

p2

p3

cg <- clusGap(met_per_mg.scale.t, kmeans, K.max=9)
Clustering k = 1,2,..., K.max (= 9): .. done
Bootstrapping, b = 1,2,..., B (= 100)  [one "." per sample]:
.................................................. 50 
.................................................. 100 
plot(cg)

cg
Clustering Gap statistic ["clusGap"] from call:
clusGap(x = met_per_mg.scale.t, FUNcluster = kmeans, K.max = 9)
B=100 simulated reference sets, k = 1..9; spaceH0="scaledPCA"
 --> Number of clusters (method 'firstSEmax', SE.factor=1): 7
          logW   E.logW       gap      SE.sim
 [1,] 6.421788 6.918019 0.4962311 0.004606659
 [2,] 6.250008 6.870524 0.6205159 0.004473502
 [3,] 6.183201 6.847694 0.6644921 0.004486972
 [4,] 6.138483 6.828390 0.6899078 0.004671327
 [5,] 6.084682 6.813268 0.7285859 0.004559963
 [6,] 6.054436 6.800183 0.7457464 0.004613803
 [7,] 6.032065 6.788598 0.7565327 0.004643470
 [8,] 6.037614 6.778026 0.7404117 0.004370461
 [9,] 5.996726 6.768415 0.7716891 0.004303381
cg <- clusGap(met_per_mg.scale.t, pam, K.max=9, diss=FALSE)
Clustering k = 1,2,..., K.max (= 9): .. done
Bootstrapping, b = 1,2,..., B (= 100)  [one "." per sample]:
.................................................. 50 
.................................................. 100 
plot(cg)

cg
Clustering Gap statistic ["clusGap"] from call:
clusGap(x = met_per_mg.scale.t, FUNcluster = pam, K.max = 9, diss = FALSE)
B=100 simulated reference sets, k = 1..9; spaceH0="scaledPCA"
 --> Number of clusters (method 'firstSEmax', SE.factor=1): 9
          logW   E.logW       gap      SE.sim
 [1,] 6.421788 6.918418 0.4966293 0.005578790
 [2,] 6.270777 6.891267 0.6204893 0.008540835
 [3,] 6.206398 6.872026 0.6656280 0.007369309
 [4,] 6.146155 6.856340 0.7101848 0.007337648
 [5,] 6.101192 6.843736 0.7425440 0.006582442
 [6,] 6.075694 6.832732 0.7570376 0.006449575
 [7,] 6.046747 6.822472 0.7757246 0.006428820
 [8,] 6.026313 6.812510 0.7861972 0.005957189
 [9,] 6.009753 6.803857 0.7941044 0.005969037
cg <- clusGap(met_per_mg.scale.t, pam, K.max=9, diss=FALSE, metric="manhattan")
Clustering k = 1,2,..., K.max (= 9): .. done
Bootstrapping, b = 1,2,..., B (= 100)  [one "." per sample]:
.................................................. 50 
.................................................. 100 
plot(cg)

cg
Clustering Gap statistic ["clusGap"] from call:
clusGap(x = met_per_mg.scale.t, FUNcluster = pam, K.max = 9, diss = FALSE, metric = "manhattan")
B=100 simulated reference sets, k = 1..9; spaceH0="scaledPCA"
 --> Number of clusters (method 'firstSEmax', SE.factor=1): 9
          logW   E.logW       gap      SE.sim
 [1,] 6.421788 6.918370 0.4965821 0.004975897
 [2,] 6.298241 6.896911 0.5986703 0.006074368
 [3,] 6.229194 6.880361 0.6511672 0.006923682
 [4,] 6.190501 6.866868 0.6763669 0.007333121
 [5,] 6.144870 6.855027 0.7101571 0.006572353
 [6,] 6.115488 6.845459 0.7299710 0.006443715
 [7,] 6.105115 6.835345 0.7302301 0.006252574
 [8,] 6.089468 6.826578 0.7371098 0.006362957
 [9,] 6.068056 6.818503 0.7504473 0.005834587

pam, euclidean

plot_clusters <- function(x, meta=sample_meta) {
  x %>% pivot_longer(-c(.rownames,.cluster), names_to="sample") %>%
    left_join(sample_meta) %>% 
        ggplot(aes(x=sample_merge, y=value)) +
    geom_line(alpha=0.1, aes(group=.rownames)) +
    facet_wrap(~.cluster) +
    geom_vline(color="red", lwd=.5, xintercept = c(seq(6.5,30.5, by=6))) + 
    theme(axis.text.x = element_text(size=7, vjust=0.5, hjust=1, angle=90))
}

assignments.pe <- pcluste %>% 
  mutate(met_per_mg = map(pcluste, augment, met_per_mg.scale.t),
         cluster_plot = map(met_per_mg, plot_clusters))
Joining with `by = join_by(sample)`Joining with `by = join_by(sample)`Joining with `by = join_by(sample)`Joining with `by = join_by(sample)`Joining with `by = join_by(sample)`Joining with `by = join_by(sample)`
walk(assignments.pe$cluster_plot, print)

met_amt


met_amt.scale <- met_amt %>% mutate(across(.cols=-c(genotype, trt), .fns=scale))

met_amt.scale.t <- met_amt.scale %>% select(-genotype, -trt) %>% t() %>% as.data.frame()

PCA

met_amt.pca <- met_amt.scale.t %>%  prcomp(scale.=TRUE)

met_amt_PCs <- met_amt.pca %>% magrittr::extract2("x") %>% as.data.frame()

met_amt_PCs %>% ggplot(aes(x=PC1,y=PC2)) +
  geom_point()


met_amt_PCs %>% ggplot(aes(x=PC2,y=PC3)) +
  geom_point()


met_amt_PCs %>% ggplot(aes(x=PC3,y=PC4)) +
  geom_point()

met_amt.mds <- met_amt.scale.t %>% dist() %>% cmdscale(x.ret=TRUE) 
autoplot(met_amt.mds)

met_amt.tsne <- met_amt.scale.t %>% tsne::tsne()
sigma summary: Min. : 0.434986821697206 |1st Qu. : 0.595665953360781 |Median : 0.676181808785075 |Mean : 0.695106609037197 |3rd Qu. : 0.780506015083736 |Max. : 1.09428067361697 |
Epoch: Iteration #100 error is: 19.2045994327469
Epoch: Iteration #200 error is: 1.18083500114745
Epoch: Iteration #300 error is: 1.06888956683155
Epoch: Iteration #400 error is: 1.02637753810654
Epoch: Iteration #500 error is: 1.01997491422502
Epoch: Iteration #600 error is: 1.01374404913146
Epoch: Iteration #700 error is: 0.997678161350794
Epoch: Iteration #800 error is: 0.993447211926238
Epoch: Iteration #900 error is: 0.990801365094571
Epoch: Iteration #1000 error is: 0.990058796867227
met_amt.tsne %>% plot()

kclust <- tibble(k=3:8) %>%
  mutate(kclust=map(k, ~kmeans(met_amt.scale.t, .x)),
         tidied = map(kclust, tidy),
         glanced = map(kclust, glance),
         augmented = map(kclust, augment, as_tibble(met_amt.mds$points) )
  )

kclust
clusters <- 
  kclust %>%
  unnest(cols = c(tidied))

assignments <- 
  kclust %>% 
  unnest(cols = c(augmented))

clusterings <- 
  kclust %>%
  unnest(cols = c(glanced))
p1 <- 
  ggplot(assignments, aes(x = V1, y = V2)) +
  geom_point(aes(color = .cluster)) + 
  facet_wrap(~ k) +
  scale_color_brewer(palette="Set1", direction = -1) +
  ggtitle("kmeans")
p1

ggplot(clusterings, aes(k, tot.withinss)) +
  geom_line() +
  geom_point()

Pam Euclidean

pcluste <- tibble(k=3:8) %>%
  mutate(pcluste=map(k, ~pam(met_amt.scale.t, .x, diss=FALSE)),
         tidied = map(pcluste, tidy),
         glanced = map(pcluste, glance),
         augmented = map(pcluste, augment, as_tibble(met_amt.mds$points) )
  )

pcluste
clusters <- 
  pcluste %>%
  unnest(cols = c(tidied))

assignments <- 
  pcluste %>% 
  unnest(cols = c(augmented))

clusterings <- 
  pcluste %>%
  unnest(cols = c(glanced))
p2 <- 
  ggplot(assignments, aes(x = V1, y = V2)) +
  geom_point(aes(color = .cluster)) + 
  facet_wrap(~ k) +
  scale_color_brewer(palette="Set1", direction = -1) +
  ggtitle("Pam Euclidean")
p2

ggplot(clusterings, aes(k, avg.silhouette.width)) +
  geom_line() +
  geom_point()

Pam Manhattan

pclustm <- tibble(k=3:8) %>%
  mutate(pclustm=map(k, ~pam(met_amt.scale.t, .x, diss=FALSE, metric="manhattan")),
         tidied = map(pclustm, tidy),
         glanced = map(pclustm, glance),
         augmented = map(pclustm, augment, as_tibble(met_amt.mds$points) )
  )

pclustm
clusters <- 
  pclustm %>%
  unnest(cols = c(tidied))

assignments <- 
  pclustm %>% 
  unnest(cols = c(augmented))

clusterings <- 
  pclustm %>%
  unnest(cols = c(glanced))
p3 <- 
  ggplot(assignments, aes(x = V1, y = V2)) +
  geom_point(aes(color = .cluster)) + 
  facet_wrap(~ k) +
  scale_color_brewer(palette="Set1", direction = -1) +
  ggtitle("Pam Manhattan")
p3

ggplot(clusterings, aes(k, avg.silhouette.width)) +
  geom_line() +
  geom_point()

Compare

p1

p2

p3

cg <- clusGap(met_amt.scale.t, kmeans, K.max=9)
Clustering k = 1,2,..., K.max (= 9): .. done
Bootstrapping, b = 1,2,..., B (= 100)  [one "." per sample]:
.................................................. 50 
.................................................. 100 
plot(cg)

cg
Clustering Gap statistic ["clusGap"] from call:
clusGap(x = met_amt.scale.t, FUNcluster = kmeans, K.max = 9)
B=100 simulated reference sets, k = 1..9; spaceH0="scaledPCA"
 --> Number of clusters (method 'firstSEmax', SE.factor=1): 8
          logW   E.logW       gap      SE.sim
 [1,] 6.563355 6.991556 0.4282007 0.004963666
 [2,] 6.482151 6.945124 0.4629731 0.004996273
 [3,] 6.442064 6.920937 0.4788730 0.004533869
 [4,] 6.384038 6.902830 0.5187923 0.004753582
 [5,] 6.356412 6.888007 0.5315949 0.004691245
 [6,] 6.336569 6.875890 0.5393202 0.004727353
 [7,] 6.317922 6.864958 0.5470355 0.004913001
 [8,] 6.299876 6.854976 0.5550993 0.004413889
 [9,] 6.291947 6.845969 0.5540214 0.004762639
cg <- clusGap(met_amt.scale.t, pam, K.max=9, diss=FALSE)
Clustering k = 1,2,..., K.max (= 9): .. done
Bootstrapping, b = 1,2,..., B (= 100)  [one "." per sample]:
.................................................. 50 
.................................................. 100 
plot(cg)

cg
Clustering Gap statistic ["clusGap"] from call:
clusGap(x = met_amt.scale.t, FUNcluster = pam, K.max = 9, diss = FALSE)
B=100 simulated reference sets, k = 1..9; spaceH0="scaledPCA"
 --> Number of clusters (method 'firstSEmax', SE.factor=1): 8
          logW   E.logW       gap      SE.sim
 [1,] 6.563355 6.991859 0.4285039 0.005297143
 [2,] 6.484182 6.966839 0.4826577 0.008211047
 [3,] 6.432616 6.948417 0.5158004 0.007966139
 [4,] 6.390202 6.933598 0.5433962 0.007710088
 [5,] 6.363875 6.920938 0.5570628 0.007291380
 [6,] 6.343806 6.910253 0.5664470 0.006931946
 [7,] 6.325227 6.900347 0.5751196 0.006931358
 [8,] 6.308374 6.891399 0.5830251 0.006742401
 [9,] 6.294289 6.882644 0.5883554 0.006017687
cg <- clusGap(met_amt.scale.t, pam, K.max=9, diss=FALSE, metric="manhattan")
Clustering k = 1,2,..., K.max (= 9): .. done
Bootstrapping, b = 1,2,..., B (= 100)  [one "." per sample]:
.................................................. 50 
.................................................. 100 
plot(cg)

cg
Clustering Gap statistic ["clusGap"] from call:
clusGap(x = met_amt.scale.t, FUNcluster = pam, K.max = 9, diss = FALSE, metric = "manhattan")
B=100 simulated reference sets, k = 1..9; spaceH0="scaledPCA"
 --> Number of clusters (method 'firstSEmax', SE.factor=1): 9
          logW   E.logW       gap      SE.sim
 [1,] 6.563355 6.992315 0.4289597 0.004710693
 [2,] 6.493257 6.968083 0.4748262 0.007267814
 [3,] 6.462072 6.951978 0.4899064 0.007574299
 [4,] 6.407769 6.938640 0.5308710 0.006184092
 [5,] 6.374247 6.927462 0.5532151 0.006475408
 [6,] 6.355711 6.917056 0.5613451 0.006445086
 [7,] 6.337981 6.907379 0.5693977 0.006107336
 [8,] 6.320155 6.898844 0.5786883 0.006034473
 [9,] 6.306475 6.891302 0.5848267 0.005913412

pam, euclidean

plot_clusters <- function(x, meta=sample_meta) {
  x %>% pivot_longer(-c(.rownames,.cluster), names_to="sample") %>%
    left_join(sample_meta) %>% 
        ggplot(aes(x=sample_merge, y=value)) +
    geom_line(alpha=0.1, aes(group=.rownames)) +
    facet_wrap(~.cluster) +
    geom_vline(color="red", lwd=.5, xintercept = c(seq(6.5,30.5, by=6))) + 
    theme(axis.text.x = element_text(size=7, vjust=0.5, hjust=1, angle=90))
}

assignments.pe <- pcluste %>% 
  mutate(met_amt = map(pcluste, augment, met_amt.scale.t),
         cluster_plot = map(met_amt, plot_clusters))
Joining with `by = join_by(sample)`Joining with `by = join_by(sample)`Joining with `by = join_by(sample)`Joining with `by = join_by(sample)`Joining with `by = join_by(sample)`Joining with `by = join_by(sample)`
walk(assignments.pe$cluster_plot, print)

---
title: "Metabolites...Clustering"
author: "Julin Maloof"
date: "03/29/2023"
output: html_notebook
---

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
```

Try some clustering


```{r}
library(tidyverse)
library(tidymodels)
library(cluster)
library(ggfortify)
```

get leaflength data
```{r}
leaflength <- read_csv("../../plant/output/leaf_lengths_metabolite.csv") %>%
  mutate(pot=str_pad(pot, width=3, pad="0"),
         sampleID=str_c("wyo", genotype, pot, sep="_")) %>%
  select(sampleID, genotype, trt, leaf_avg, leaf_avg_std)
leaflength %>% arrange(sampleID)
```

get and wrangle metabolite data
```{r}
met_raw <-read_csv("../input/metabolites_set1.csv")
met <- met_raw %>% 
  mutate(pot=str_pad(pot, width = 3, pad = "0")) %>%
  mutate(sampleID=str_c("wyo", genotype, pot, sep="_")) %>%
  mutate(trt=ifelse(is.na(autoclave), "BLANK", autoclave)) %>%
  select(sampleID, genotype, tissue, trt, sample_mass = `sample_mass mg`, !submission_number:concatenate)  %>%
  
  #bring in leaf length
  left_join({leaflength %>% select(sampleID, leaf_avg_std)}) %>%
  select(sampleID, genotype, tissue, trt, leaf_avg_std, everything()) %>%
  
  #make long
  pivot_longer(!sampleID:sample_mass, names_to = "metabolite", values_to = "met_amt") %>%
  
  #filter away unnamed
  filter(str_detect(metabolite, pattern="^[0-9]+$", negate=TRUE)) %>%
  
  #adjust by sample mass
  mutate(met_per_mg=met_amt/sample_mass) %>%
  
  pivot_wider(id_cols = c(sampleID, genotype, trt, leaf_avg_std), 
              names_from = c(tissue, metabolite), 
              values_from = starts_with("met_"),
              names_sep = "_")

met 
```

split this into two data frames, one normalized by tissue amount and one not.
```{r}
met_per_mg <- met %>% select(sampleID, genotype, trt, starts_with("met_per_mg")) %>%
  as.data.frame() %>% column_to_rownames("sampleID")
met_amt <- met %>% select(sampleID,  genotype, trt, starts_with("met_amt")) %>%
  as.data.frame() %>% column_to_rownames("sampleID")
```

## met_per_mg
```{r}

met_per_mg.scale <- met_per_mg %>% mutate(across(.cols=-c(genotype, trt), .fns=scale))

met_per_mg.scale.t <- met_per_mg.scale %>% select(-genotype, -trt) %>% t() %>% as.data.frame()
```

metadata for later plotting

```{r}
sample_meta <- leaflength %>% 
  select(sample=sampleID, genotype, trt, leaf_avg, leaf_avg_std) %>%
  mutate(sample_merge=make.unique(str_c(genotype, "_", trt)))
sample_meta
```

## PCA

```{r}
met_per_mg.pca <- met_per_mg.scale.t %>%  prcomp(scale.=TRUE)

met_per_mg_PCs <- met_per_mg.pca %>% magrittr::extract2("x") %>% as.data.frame()

met_per_mg_PCs %>% ggplot(aes(x=PC1,y=PC2)) +
  geom_point()

met_per_mg_PCs %>% ggplot(aes(x=PC2,y=PC3)) +
  geom_point()

met_per_mg_PCs %>% ggplot(aes(x=PC3,y=PC4)) +
  geom_point()

```
```{r}
met_per_mg.mds <- met_per_mg.scale.t %>% dist() %>% cmdscale(x.ret=TRUE) 
autoplot(met_per_mg.mds)
```

```{r}
met_per_mg.tsne <- met_per_mg.scale.t %>% tsne::tsne()

met_per_mg.tsne %>% plot()
```
```{r}
kclust <- tibble(k=3:8) %>%
  mutate(kclust=map(k, ~kmeans(met_per_mg.scale.t, .x)),
         tidied = map(kclust, tidy),
         glanced = map(kclust, glance),
         augmented = map(kclust, augment, as_tibble(met_per_mg.mds$points) )
  )

kclust
```

```{r}
clusters <- 
  kclust %>%
  unnest(cols = c(tidied))

assignments <- 
  kclust %>% 
  unnest(cols = c(augmented))

clusterings <- 
  kclust %>%
  unnest(cols = c(glanced))
```

```{r}
RColorBrewer::display.brewer.all(type="qual")
```


```{r}
p1 <- 
  ggplot(assignments, aes(x = V1, y = V2)) +
  geom_point(aes(color = .cluster)) + 
  facet_wrap(~ k) +
  scale_color_brewer(palette="Set1", direction = -1) +
  ggtitle("kmeans")
p1
```

```{r}
ggplot(clusterings, aes(k, tot.withinss)) +
  geom_line() +
  geom_point()
```

### Pam Euclidean
```{r}
pcluste <- tibble(k=3:8) %>%
  mutate(pcluste=map(k, ~pam(met_per_mg.scale.t, .x, diss=FALSE)),
         tidied = map(pcluste, tidy),
         glanced = map(pcluste, glance),
         augmented = map(pcluste, augment, as_tibble(met_per_mg.mds$points) )
  )

pcluste
```

```{r}
clusters <- 
  pcluste %>%
  unnest(cols = c(tidied))

assignments <- 
  pcluste %>% 
  unnest(cols = c(augmented))

clusterings <- 
  pcluste %>%
  unnest(cols = c(glanced))
```


```{r}
p2 <- 
  ggplot(assignments, aes(x = V1, y = V2)) +
  geom_point(aes(color = .cluster)) + 
  facet_wrap(~ k) +
  scale_color_brewer(palette="Set1", direction = -1) +
  ggtitle("Pam Euclidean")
p2
```

```{r}
ggplot(clusterings, aes(k, avg.silhouette.width)) +
  geom_line() +
  geom_point()
```


## Pam Manhattan
```{r}
pclustm <- tibble(k=3:8) %>%
  mutate(pclustm=map(k, ~pam(met_per_mg.scale.t, .x, diss=FALSE, metric="manhattan")),
         tidied = map(pclustm, tidy),
         glanced = map(pclustm, glance),
         augmented = map(pclustm, augment, as_tibble(met_per_mg.mds$points) )
  )

pclustm
```

```{r}
clusters <- 
  pclustm %>%
  unnest(cols = c(tidied))

assignments <- 
  pclustm %>% 
  unnest(cols = c(augmented))

clusterings <- 
  pclustm %>%
  unnest(cols = c(glanced))
```



```{r}
p3 <- 
  ggplot(assignments, aes(x = V1, y = V2)) +
  geom_point(aes(color = .cluster)) + 
  facet_wrap(~ k) +
  scale_color_brewer(palette="Set1", direction = -1) +
  ggtitle("Pam Manhattan")
p3
```

```{r}
ggplot(clusterings, aes(k, avg.silhouette.width)) +
  geom_line() +
  geom_point()
```

### Compare

```{r}
p1
p2
p3

```


```{r}
cg <- clusGap(met_per_mg.scale.t, kmeans, K.max=9)
plot(cg)
cg

cg <- clusGap(met_per_mg.scale.t, pam, K.max=9, diss=FALSE)
plot(cg)
cg

cg <- clusGap(met_per_mg.scale.t, pam, K.max=9, diss=FALSE, metric="manhattan")
plot(cg)
cg
```
## pam, euclidean

```{r}
plot_clusters <- function(x, meta=sample_meta) {
  x %>% pivot_longer(-c(.rownames,.cluster), names_to="sample") %>%
    left_join(sample_meta) %>% 
        ggplot(aes(x=sample_merge, y=value)) +
    geom_line(alpha=0.1, aes(group=.rownames)) +
    facet_wrap(~.cluster) +
    geom_vline(color="red", lwd=.5, xintercept = c(seq(6.5,30.5, by=6))) + 
    theme(axis.text.x = element_text(size=7, vjust=0.5, hjust=1, angle=90))
}

assignments.pe <- pcluste %>% 
  mutate(met_per_mg = map(pcluste, augment, met_per_mg.scale.t),
         cluster_plot = map(met_per_mg, plot_clusters))

walk(assignments.pe$cluster_plot, print)
```

## met_amt

```{r}

met_amt.scale <- met_amt %>% mutate(across(.cols=-c(genotype, trt), .fns=scale))

met_amt.scale.t <- met_amt.scale %>% select(-genotype, -trt) %>% t() %>% as.data.frame()
```

## PCA

```{r}
met_amt.pca <- met_amt.scale.t %>%  prcomp(scale.=TRUE)

met_amt_PCs <- met_amt.pca %>% magrittr::extract2("x") %>% as.data.frame()

met_amt_PCs %>% ggplot(aes(x=PC1,y=PC2)) +
  geom_point()

met_amt_PCs %>% ggplot(aes(x=PC2,y=PC3)) +
  geom_point()

met_amt_PCs %>% ggplot(aes(x=PC3,y=PC4)) +
  geom_point()

```
```{r}
met_amt.mds <- met_amt.scale.t %>% dist() %>% cmdscale(x.ret=TRUE) 
autoplot(met_amt.mds)
```

```{r}
met_amt.tsne <- met_amt.scale.t %>% tsne::tsne()

met_amt.tsne %>% plot()
```

```{r}
kclust <- tibble(k=3:8) %>%
  mutate(kclust=map(k, ~kmeans(met_amt.scale.t, .x)),
         tidied = map(kclust, tidy),
         glanced = map(kclust, glance),
         augmented = map(kclust, augment, as_tibble(met_amt.mds$points) )
  )

kclust
```

```{r}
clusters <- 
  kclust %>%
  unnest(cols = c(tidied))

assignments <- 
  kclust %>% 
  unnest(cols = c(augmented))

clusterings <- 
  kclust %>%
  unnest(cols = c(glanced))
```


```{r}
p1 <- 
  ggplot(assignments, aes(x = V1, y = V2)) +
  geom_point(aes(color = .cluster)) + 
  facet_wrap(~ k) +
  scale_color_brewer(palette="Set1", direction = -1) +
  ggtitle("kmeans")
p1
```

```{r}
ggplot(clusterings, aes(k, tot.withinss)) +
  geom_line() +
  geom_point()
```

### Pam Euclidean
```{r}
pcluste <- tibble(k=3:8) %>%
  mutate(pcluste=map(k, ~pam(met_amt.scale.t, .x, diss=FALSE)),
         tidied = map(pcluste, tidy),
         glanced = map(pcluste, glance),
         augmented = map(pcluste, augment, as_tibble(met_amt.mds$points) )
  )

pcluste
```

```{r}
clusters <- 
  pcluste %>%
  unnest(cols = c(tidied))

assignments <- 
  pcluste %>% 
  unnest(cols = c(augmented))

clusterings <- 
  pcluste %>%
  unnest(cols = c(glanced))
```


```{r}
p2 <- 
  ggplot(assignments, aes(x = V1, y = V2)) +
  geom_point(aes(color = .cluster)) + 
  facet_wrap(~ k) +
  scale_color_brewer(palette="Set1", direction = -1) +
  ggtitle("Pam Euclidean")
p2
```

```{r}
ggplot(clusterings, aes(k, avg.silhouette.width)) +
  geom_line() +
  geom_point()
```


## Pam Manhattan
```{r}
pclustm <- tibble(k=3:8) %>%
  mutate(pclustm=map(k, ~pam(met_amt.scale.t, .x, diss=FALSE, metric="manhattan")),
         tidied = map(pclustm, tidy),
         glanced = map(pclustm, glance),
         augmented = map(pclustm, augment, as_tibble(met_amt.mds$points) )
  )

pclustm
```

```{r}
clusters <- 
  pclustm %>%
  unnest(cols = c(tidied))

assignments <- 
  pclustm %>% 
  unnest(cols = c(augmented))

clusterings <- 
  pclustm %>%
  unnest(cols = c(glanced))
```



```{r}
p3 <- 
  ggplot(assignments, aes(x = V1, y = V2)) +
  geom_point(aes(color = .cluster)) + 
  facet_wrap(~ k) +
  scale_color_brewer(palette="Set1", direction = -1) +
  ggtitle("Pam Manhattan")
p3
```

```{r}
ggplot(clusterings, aes(k, avg.silhouette.width)) +
  geom_line() +
  geom_point()
```

### Compare

```{r}
p1
p2
p3

```


```{r}
cg <- clusGap(met_amt.scale.t, kmeans, K.max=9)
plot(cg)
cg

cg <- clusGap(met_amt.scale.t, pam, K.max=9, diss=FALSE)
plot(cg)
cg

cg <- clusGap(met_amt.scale.t, pam, K.max=9, diss=FALSE, metric="manhattan")
plot(cg)
cg
```
## pam, euclidean

```{r}
plot_clusters <- function(x, meta=sample_meta) {
  x %>% pivot_longer(-c(.rownames,.cluster), names_to="sample") %>%
    left_join(sample_meta) %>% 
        ggplot(aes(x=sample_merge, y=value)) +
    geom_line(alpha=0.1, aes(group=.rownames)) +
    facet_wrap(~.cluster) +
    geom_vline(color="red", lwd=.5, xintercept = c(seq(6.5,30.5, by=6))) + 
    theme(axis.text.x = element_text(size=7, vjust=0.5, hjust=1, angle=90))
}

assignments.pe <- pcluste %>% 
  mutate(met_amt = map(pcluste, augment, met_amt.scale.t),
         cluster_plot = map(met_amt, plot_clusters))

walk(assignments.pe$cluster_plot, print)
```
